The evolving cybersecurity landscape presents SMBs with a host of new threats to their clients, their data, and their bottom line. In part 2 of this blog series, learn three quick processes Webroot’s CISO, Gary Hayslip, recommends to help small businesses beat modern threats.

I created the vmkernel port group, tried again, same error
Then I thought, that it be a problem with IPs, since the vmkernel port group has a new ip... I tried to allow that vmkernel port group ip on linux server nfs settings, but now I got an error that mount request was denied.

original error is Unable to query remote mount point's attributes

I also tried adding no_root_squash permission in linux NFS settings, and it does not help

Yes I tried it with and without no_root_squash.
The server itself is an older linux server (I do not need performance, since this will be a datastore for backups), but the data itself is on a fibrechannel connected infortrend enclosure.

The server has already NFS connections to other linux servers (as a NFS server, not client).

The question was pointed in the wrong direction... I thought the problem was the NFS client - that is VMware esxi, but the problem resolved itself after a scheduled update and reboot of NFS server (even if it worked ok with other non VMware NFS clients)